From: Jordan Mendelson <jordy@napster.com>
To: linux-kernel@vger.kernel.org
Subject: Poor TCP Performance 2.4.0-10 <-> Win98 SE PPP
Date: Mon, 06 Nov 2000 18:17:19 -0800 [thread overview]
Message-ID: <3A07662F.39D711AE@napster.com> (raw)
We are seeing a performance slowdown between Windows PPP users and
servers running 2.4.0-test10. Attached is a tcpdump log of the
connection. The machines is without TCP ECN support. The Windows machine
is running Windows 98 SE 4.10.2222 A dialed up over PPP w/ TCP header
compression. The Linux machine is connected directly to the Internet via
a 6509. There is a possibility that we are hitting a bandwidth cap on
outgoing traffic.
18:51:33.282286 eth0 < 209.179.248.69.1238 > 64.124.41.177.8888: S
3013389:3013389(0) win 8192 <mss 536,nop,nop,sackOK> (DF)
18:51:33.282395 eth0 > 64.124.41.177.8888 > 209.179.248.69.1238: S
2198113890:2198113890(0) ack 3013390 win 5840 <mss 1460,nop,nop,sackOK>
(DF)
18:51:33.509532 eth0 < 209.179.248.69.1238 > 64.124.41.177.8888: .
1:1(0) ack 1 win 8576 (DF)
18:51:33.510360 eth0 < 209.179.248.69.1238 > 64.124.41.177.8888: .
1:1(0) ack 1 win 65280 (DF)
18:51:33.510416 eth0 < 209.179.248.69.1238 > 64.124.41.177.8888: P
1:44(43) ack 1 win 65280 (DF)
18:51:33.510457 eth0 > 64.124.41.177.8888 > 209.179.248.69.1238: .
1:1(0) ack 44 win 5840 (DF)
18:51:33.988330 eth0 > 64.124.41.177.8888 > 209.179.248.69.1238: P
1:21(20) ack 44 win 5840 (DF)
18:51:33.988474 eth0 > 64.124.41.177.8888 > 209.179.248.69.1238: P
21:557(536) ack 44 win 5840 (DF)
18:51:36.987336 eth0 > 64.124.41.177.8888 > 209.179.248.69.1238: P
1:21(20) ack 44 win 5840 (DF)
18:51:37.177772 eth0 < 209.179.248.69.1238 > 64.124.41.177.8888: P
44:56(12) ack 21 win 65260 (DF)
18:51:37.177794 eth0 > 64.124.41.177.8888 > 209.179.248.69.1238: P
21:557(536) ack 44 win 5840 (DF)
18:51:37.177806 eth0 > 64.124.41.177.8888 > 209.179.248.69.1238: P
557:1093(536) ack 56 win 5840 (DF)
18:51:39.845046 eth0 < 209.179.248.69.1238 > 64.124.41.177.8888: P
44:456(412) ack 21 win 65260 (DF)
18:51:39.845071 eth0 > 64.124.41.177.8888 > 209.179.248.69.1238: .
1093:1093(0) ack 456 win 6432 <nop,nop, sack 1 {44:56} > (DF)
18:51:43.177329 eth0 > 64.124.41.177.8888 > 209.179.248.69.1238: P
21:557(536) ack 456 win 6432 (DF)
18:51:43.538219 eth0 < 209.179.248.69.1238 > 64.124.41.177.8888: .
456:456(0) ack 557 win 65280 (DF)
18:51:43.538275 eth0 > 64.124.41.177.8888 > 209.179.248.69.1238: P
557:1093(536) ack 456 win 6432 (DF)
18:51:43.538292 eth0 > 64.124.41.177.8888 > 209.179.248.69.1238: P
1093:1629(536) ack 456 win 6432 (DF)
18:51:55.537346 eth0 > 64.124.41.177.8888 > 209.179.248.69.1238: P
557:1093(536) ack 456 win 6432 (DF)
18:51:55.841360 eth0 < 209.179.248.69.1238 > 64.124.41.177.8888: .
456:456(0) ack 1093 win 65280 (DF)
18:51:55.841384 eth0 > 64.124.41.177.8888 > 209.179.248.69.1238: P
1093:1629(536) ack 456 win 6432 (DF)
18:51:55.841393 eth0 > 64.124.41.177.8888 > 209.179.248.69.1238: P
1629:1849(220) ack 456 win 6432 (DF)
18:52:19.837335 eth0 > 64.124.41.177.8888 > 209.179.248.69.1238: P
1093:1629(536) ack 456 win 6432 (DF)
18:52:20.153776 eth0 < 209.179.248.69.1238 > 64.124.41.177.8888: .
456:456(0) ack 1629 win 65280 (DF)
18:52:20.153803 eth0 > 64.124.41.177.8888 > 209.179.248.69.1238: P
1629:1849(220) ack 456 win 6432 (DF)
18:53:08.147334 eth0 > 64.124.41.177.8888 > 209.179.248.69.1238: P
1629:1849(220) ack 456 win 6432 (DF)
18:53:08.475911 eth0 < 209.179.248.69.1238 > 64.124.41.177.8888: .
456:456(0) ack 1849 win 65060 (DF)
18:53:08.475947 eth0 > 64.124.41.177.8888 > 209.179.248.69.1238: P
1849:1871(22) ack 456 win 6432 (DF)
18:54:44.467332 eth0 > 64.124.41.177.8888 > 209.179.248.69.1238: P
1849:1871(22) ack 456 win 6432 (DF)
18:54:44.824187 eth0 < 209.179.248.69.1238 > 64.124.41.177.8888: .
456:456(0) ack 1871 win 65038 (DF)
18:54:44.824256 eth0 > 64.124.41.177.8888 > 209.179.248.69.1238: P
1871:1893(22) ack 456 win 6432 (DF)
18:54:55.212750 eth0 < 209.179.248.69.1238 > 64.124.41.177.8888: P
456:506(50) ack 1871 win 65038 (DF)
18:54:55.212767 eth0 > 64.124.41.177.8888 > 209.179.248.69.1238: .
1893:1893(0) ack 506 win 6432 (DF)
18:54:55.571337 eth0 > 64.124.41.177.8888 > 209.179.248.69.1238: P
1893:2429(536) ack 506 win 6432 (DF)
18:54:57.394879 eth0 < 209.179.248.69.1238 > 64.124.41.177.8888: P
456:506(50) ack 1871 win 65038 (DF)
18:54:57.394894 eth0 > 64.124.41.177.8888 > 209.179.248.69.1238: .
2429:2429(0) ack 506 win 6432 <nop,nop, sack 1 {456:506} > (DF)
Here are some numbers from /proc/sys/net/ipv4:
$ cat /proc/sys/net/ipv4/tcp_rmem
4096 87380 174760
$ cat /proc/sys/net/ipv4/tcp_wmem
4096 16384 131072
$ cat /proc/sys/net/ipv4/tcp_sack
1
$ cat /proc/sys/net/ipv4/tcp_fack
1
$ cat /proc/sys/net/ipv4/tcp_dsack
1
$ cat /proc/sys/net/ipv4/tcp_window_scaling
1
$ cat /proc/sys/net/ipv4/tcp_syncookies
0
$ cat /proc/sys/net/ipv4/tcp_timestamps
1
Jordan
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next reply other threads:[~2000-11-07 2:17 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2000-11-07 2:17 Jordan Mendelson [this message]
2000-11-07 4:28 ` Poor TCP Performance 2.4.0-10 <-> Win98 SE PPP David S. Miller
2000-11-07 5:20 ` Jordan Mendelson
2000-11-07 5:33 ` David S. Miller
2000-11-07 6:13 ` Jordan Mendelson
2000-11-07 6:03 ` David S. Miller
2000-11-07 6:44 ` Jordan Mendelson
2000-11-07 6:56 ` David S. Miller
2000-11-07 7:16 ` Jordan Mendelson
2000-11-07 7:12 ` David S. Miller
2000-11-07 7:32 ` Jordan Mendelson
2000-11-07 7:27 ` David S. Miller
2000-11-07 9:41 ` Andi Kleen
2000-11-07 9:57 ` David S. Miller
2000-11-07 12:22 ` Alan Cox
2000-11-07 12:10 ` David S. Miller
2000-11-07 9:42 ` Andi Kleen
2000-11-07 18:13 ` Jordan Mendelson
2000-11-07 9:38 ` Rogier Wolff
2000-11-07 9:58 ` David S. Miller
2000-11-07 10:36 ` Rogier Wolff
2000-11-07 22:43 ` Lincoln Dale
2000-11-07 7:03 ` Andi Kleen
2000-11-07 6:59 ` David S. Miller
2000-11-07 7:16 ` Andi Kleen
2000-11-07 7:14 ` David S. Miller
2000-11-07 9:35 ` Rogier Wolff
2000-11-07 10:00 ` David S. Miller
[not found] <3A076701.F437F88B@napster.com>
2000-11-07 3:44 ` Jordan Mendelson
2000-11-07 4:29 ` David S. Miller
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